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Well, I did...results surprised me

 

Stopped two watches between 59 and 60s.

Lemania 2320 - minute hand on register stops fractionally between 0 and 1 min.

Glashutte Cal 61 - minute hand completes jump to 1 min, once sequence starts.

For what it’s worth, it seems that different semi-instantaneous chronograph movements behave differently. I will retract my original explanation though!

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